Session: Detachment Dynamics: Heat, Deformation, and Fluids in Extensional Systems (2009 Portland GSA Annual Meeting (18-21 October 2009))

Paper #

Start Time

1

8:00 AM

THROUGH A GLASS, DARKLY: SYMMETRY AND ASYMMETRY IN THE MAGMA POOR RIFTED MARGINS OF SOUTHERN AUSTRALIA AND EAST ANTARCTICA

DIREEN, Nicholas G.¹, STAGG, Howard M.J.², SYMONDS, Philip A.² and COLWELL, James B.², (1)School of Earth Sciences, University of Tasmania, Private Bag 79, Hobart, TAS 7001, Australia, (2)Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia, ndireen@frogtech.com.au, ndireen@frogtech.com.au

2

8:20 AM

HOT AND COLD DETACHMENT ZONES: LINKING LISTRIC NORMAL FAULTING IN THE SOUTHERN CANADIAN ROCKIES FORELAND THRUST-FOLD BELT TO BACK-ARC DEXTRAL TRANSTENSION AND DUCTILE CRUSTAL BOUDINAGE

PRICE, Raymond A., Dept. of Geological Sciences and Geological Engineering, Queen's Univ, Kingston, ON K7L 3N6, price@geol.queensu.ca, price@geol.queensu.ca

3

8:35 AM

CORDILLERAN DETACHMENTS AS DYNAMIC INTERFACES BETWEEN METEORIC AND DEEP FLUID SYSTEMS

TEYSSIER, Christian¹, WHITNEY, Donna L.¹ and MULCH, Andreas², (1)Geology & Geophysics, University of Minnesota, Minneapolis, MN 55455, (2)Institute of Geology, Universität Hannover, Callinstr. 30, Hannover, 30167, Germany, teyssier@umn.edu, teyssier@umn.edu

4

8:50 AM

CONTRASTING MIDDLE AND UPPER CRUSTAL DETACHMENT FAULT HYDROTHERMAL SYSTEMS: VALHALLA COMPLEX, BRITISH COLUMBIA AND THE SOUTHERN WHITE PINE RANGE, NEVADA

HOLK, Gregory J.¹, TAYLOR Jr, Hugh P.², TONEVA, Denitsa³ and FRANCIS, Robert D.³, (1)Department of Geological Sciences and IIRMES, California State Univ Long Beach, 1250 Bellflower Blvd, Long Beach, CA 90840, (2)Division of Geological and Planetary Sciences, California Institute of Technology, 1250 California Blvd, Pasadena, CA 91125, (3)Department of Geological Sciences, California State Univ Long Beach, 1250 Bellflower Blvd, Long Beach, CA 90840, gholk@csulb.edu, gholk@csulb.edu

5

9:05 AM

STUDY OF A FOSSIL HYDROTHERMAL SYSTEM IN THE NORTHERN SNAKE RANGE USING STABLE ISOTOPE, MICROSTRUCTURAL AND 40Ar/39Ar DATA AND ITS USE AS A PALEOALTIMETER

GEBELIN, Aude, Institut für Geologie, Leibniz Universität Hannover, Callinstr. 30, Hannover, 30167, Germany, MULCH, Andreas, Institute of Geology, Universität Hannover, Callinstr. 30, Hannover, 30167, Germany, TEYSSIER, Christian, Geology and Geophysics, Univ of Minnesota, Minneapolis, MN 55455 and HEIZLER, Matthew T., New Mexico Bureau of Geology & Mineral Resources, New Mexico Institute of Mining & Technology, Socorro, NM 87801, gebelin@geowi.uni-hannover.de, gebelin@geowi.uni-hannover.de

6

9:25 AM

UNUSUAL ‘GRADED' FAULT ROCKS FROM THE SNAKE RANGE DETACHMENT, NV – IMPLICATIONS FOR FLUID INVOLVEMENT IN LOW-ANGLE NORMAL FAULT PROCESSES AND THE ANGLE OF SLIP OF CORE COMPLEX DETACHMENTS

HAINES, Samuel H., Chevron Energy Technology Corporation, 1500 Louisiana Street, Room 28092, Houston, TX 77019 and VAN DER PLUIJM, Ben, Geological Sciences, University of Michigan, 2534 C. C. Little Building, 1100 North University Ave, Ann Arbor, MI 48109, SHaines@chevron.com, SHaines@chevron.com

7

9:40 AM

PERVASIVE MID-CRUSTAL EXTENSIONAL STRAIN FOLLOWED BY RAPID LOCALIZATION: AN EXAMPLE FROM THE PIONEER CORE COMPLEX, IDAHO

VOGL, James J.¹, RODGERS, David W.² and KENT, Allen¹, (1)Department of Geological Sciences, University of Florida, Gainesville, FL 32611, (2)Department of Geosciences, Idaho State University, 921 South 8th Ave., Box 8072, Pocatello, ID 83209, jvogl@geology.ufl.edu, jvogl@geology.ufl.edu

8

9:55 AM

‘MINIDETACHMENT' LOCALIZATION CONTROLLED BY FLUID INFILTRATION IN THE FOOTWALL OF THE WHIPPLE MOUNTAINS CORE COMPLEX: WEAK MATERIALS OR HIGH PORE PRESSURE?

SELVERSTONE, Jane¹, WOODRUFF, William H.¹ and AXEN, Gary², (1)Earth & Planetary Sciences, University of New Mexico, MSC03 2040, Albuquerque, NM 87131, (2)Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, selver@unm.edu, selver@unm.edu

10:10 AM

Break

9

10:25 AM

EVIDENCE FOR STRESS ROTATION NEAR THE WEST SALTON DETACHMENT FAULT (WSDF), SALTON TROUGH, CALIFORNIA

AXEN, Gary¹, LUTHER, Amy², SELVERSTONE, Jane³ and KHALSA, Niranjan¹, (1)Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801, (2)Department of Earth & Environmental Science, New Mexico Tech, 801 Leroy Pl, Socorro, NM 87801, (3)Earth & Planetary Sciences, University of New Mexico, MSC03-2040, Albuquerque, NM 87131-0001, gaxen@ees.nmt.edu, gaxen@ees.nmt.edu

10

10:45 AM

SYSTEMATICALLY FRACTURED CLASTS IN THE TITUS CANYON FORMATION: EVIDENCE FOR LATE-STAGE BRITTLE DEFORMATION IN THE BOUNDARY CANYON DETACHMENT SYSTEM

LINDEMANN, Christie D. and RIGGS, Eric M., Dept. of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907-2051, emriggs@purdue.edu, emriggs@purdue.edu

11

11:00 AM

Withdrawn

12

11:15 AM

STRAIN PARTITIONING IN SYNTHETIC ACCOMMODATION ZONES AND SELECTED GEOTHERMAL SYSTEMS IN COLORADO

MORGAN, Paul and SARES, Matthew, Colorado Geological Survey, 1313 Sherman Street, Room 715, Denver, CO 80203, Paul.Morgan@nau.edu, Paul.Morgan@nau.edu

13

11:30 AM

U-PB & O-ISOTOPE INVESTIGATION OF AN EOCENE MYLONITIC ORTHOGNEISS ON SERIFOS: A RECORD OF MELTING OR HP METAMORPHISM IN THE WESTERN CYCLADES?

SENKOWSKI, C.A.¹, SCHNEIDER, D.A.¹, IGLSEDER, C.², GRASEMANN, B.² and SCHMITT, A.³, (1)Department of Earth Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada, (2)Department of Geodynamics & Sedimentology, University of Vienna, Vienna, 1090, Austria, (3)Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095-1567, csenk027@uottawa.ca, csenk027@uottawa.ca

14

11:45 AM

THE AMA DRIME DETACHMENT, TIBET-NEPAL: INSIGHTS INTO OROGEN-PARALLEL EXTENSION AND EXHUMATION OF THE AMA DRIME MASSIF

LANGILLE, Jackie, Department of Environmental Science, University of North Carolina at Asheville, One University Heights, Asheville, NC 28804, JESSUP, Micah, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996, COTTLE, John, Earth Sciences, University of California, Santa Barbara, CA 93106 and NEWELL, Dennis, Department of Geology, Utah State University, Logan, UT 84321, jlangill@unca.edu, jlangill@unca.edu

2009 Portland GSA Annual Meeting (18-21 October 2009)

T43. Detachment Dynamics: Heat, Deformation, and Fluids in Extensional Systems